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xen-devel
Re: [Xen-devel] Live migration with MMIO pages
On 31/10/07 17:31, "Tim Deegan" <Tim.Deegan@xxxxxxxxxxxxx> wrote:
> For HVM guests we let that pass if the GFN is known to be acceptable
> MMIO (by its p2m type). There needs to be an equivalent get-out here
> for PV guests -- iomem_access_permitted(d, mfn_x(gmfn), mfn_x(gmfn))
> should do.
We shouldn't really need to do a iomem_access_permitted() check here. If
this is a PV guest then the access check was made when the guest pagetable
was validated. We can just circumvent these checks entirely for PV guests.
-- Keir
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